Ducks and other birds have been fixed some months ago. The old reviews of course won't talk about it. I wanted to counter-balance this with a positive review.
I'm not sure if this should be a DLC or not. I'm 50/50 on this one. I could've been in the base game, but then maybe it does offer something extra that should be a DLC too. In any case, it's not that expensive, so why not?
The main appeals of this DLC are the decoys and waterfowl blind. The waterfowl blind can actually be used to hunt land animals too. I haven't seen a difference between this blind and the others. It's just the looks that are different, it seems. The decoys will make ducks appear more often. I'd say it makes the hunts more fun, but also makes you kinda OP. Personally, I enjoy using them as it reduces the waiting time, and also you can expect ducks to land very close to your decoys, making them very easy to shoot.